Experimental Measurements and Multiphase Flow Models in Solid SiC Foam Beds

Solid foam matrices have been recently introduced and present it highly permeable porous structure with a high porosity (0.60-0.95). which enables a considerably, reduction of the pressure drops along the catalyst bed even with a high shecific surface area. It appears today that despite the hydrodynamics of trickle-bed reactors operating with conventional packings (spheres, extrudates, monoliths, etc.) has become largely documented in the recent literature, trickle-bed hydrodynamic behavour with solid foam packings, oil the contrary, largely remains terra incognita. In this contest, two phases flows (stir-water) in solid foams under cocurrent trickle flow conditions were analyzed in a fixed-bed at ambient conditions. From Residence Time Distribution (RTD) curies, a new set of experimental data based oil the hydrodynamics parameters (pressure drop and liquid holdup) of solid foams are presented. A model based oil a cubic lattice approach developed in previous work is used to calculate the equivalent diameter for solid foam packings. Finally, through the modified Eotvos number and the relative permeability concept, the two-phase: pressure drop and liquid holdup are well estimated. These news results are important parameters for the design of new process in trickle flow conditions with solid foam packing. 2008 American Institute of Chemical Engineers AIChE J, 54: 2823-2832, 2008